X-Git-Url: https://git.cinelerra-gg.org/git/?a=blobdiff_plain;f=cinelerra-5.1%2Fplugins%2Fhistogram%2Fhistogram.C;h=523c863f3e0bc142c8b372dbde030f44c147a737;hb=6ca0a7892ec6459a54fcb3ba3a223d1ddc5ce402;hp=da67c208694425820ffdc42af07f0949562086d7;hpb=5a46f81a504562b7c8a0c4ff940e2b5b5c068ded;p=goodguy%2Fcinelerra.git

diff --git a/cinelerra-5.1/plugins/histogram/histogram.C b/cinelerra-5.1/plugins/histogram/histogram.C
index da67c208..523c863f 100644
--- a/cinelerra-5.1/plugins/histogram/histogram.C
+++ b/cinelerra-5.1/plugins/histogram/histogram.C
@@ -280,7 +280,8 @@ float HistogramMain::calculate_level(float input,
 // Scale to input range
 	if(!EQUIV(config.high_input[mode], config.low_input[mode]))
 	{
-		output = (input - config.low_input[mode]) /
+		output = input < config.low_input[mode] ? 0 :
+		    (input - config.low_input[mode]) /
 			(config.high_input[mode] - config.low_input[mode]);
 	}
 	else
@@ -457,8 +458,8 @@ int HistogramMain::process_buffer(VFrame *frame,
 		if( cpus > smps ) cpus = smps;
 		engine = new HistogramEngine(this, cpus, cpus);
 	}
-// Always plot to set the curves if automatic
-	if(config.plot || config.automatic) send_render_gui(frame);
+// if to plot histogram
+	if(config.plot) send_render_gui(frame);
 
 // Generate tables here.  The same table is used by many packages to render
 // each horizontal stripe.  Need to cover the entire output range in  each